1. A test method for the content of nickel chloride hexahydrate is characterized in that the test method includes the following steps: a: take 1 volume of the liquid to be tested with a pipette to 5 volume volume bottles, add 1 volume of concentrated nitric acid, and then add 2 volume of ethylene glycol, and then use pure water to fill 5 volume parts to obtain liquid A; b: Take 1 liquid to be tested into a 5-volume [...]
Ammonium paratungstate is heated in a rotary furnace with wet dust collection, the vaporized crystal water is discharged first, and then a large amount of combined ammonia is lost, and finally tungsten trioxide (industrial) is formed. Blue tungsten oxide has the characteristics of good activity, larger than surface, easy doping and maintaining the original crystal shape. Therefore, both at home and abroad have attached great importance to the production of blue tungsten oxide. According to the characteristics of ammonia pyrolysis [...]
The invention relates to a method for preparing nanometer magnesium carbonate crystals, which can prepare nanometer magnesium carbonate crystals with high speed and high purity. To realize the above purpose, the technical scheme of the invention is to design a method for preparing nanometer magnesium carbonate crystals, including the following steps: 1) Prepare MgCl2 solution with concentration of 3.2mol/l, and add 1.2g/l block polyoxyethylene polyoxyethylene ether, 1.5g/l glycol monostearate and 2.2g/l hydroxypropyl methyl cellulose were mixed slowly and evenly to obtain solution [...]
Stannous pyrophosphate, chemical formula Sn2P2O7, molecular weight 411.32, amorphous powder. It is prepared by heating tin (Ⅱ) diphosphate at 350 ~ 400℃. Production method of stannous pyrophosphate: In the double decomposition method, stannous chloride and sodium pyrophosphate were dissolved in water, and an appropriate amount of activated carbon was added for decolorization and filtration to obtain a clean solution. Then add water to each solution and adjust to a certain concentration. Sodium pyrophosphate solution was first added to the reactor, and [...]
Nano iron oxide is produced by nano synthesis technology and high purity raw materials, with high purity, low impurity content, small particle size, uniform particle size, high temperature resistance, good dispersion and so on Nano ferric oxide is a new kind of nano material, which can be widely used in coating, paint, ink and chemical materials. Because of its small particle size, it has the characteristics of ultraviolet absorption, high chroma, high coloring power, high transparency, etc., and it is [...]
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